Engine-starting apparatus.



J. BIJUR.

ENGINE STARTING APPARATUS.

I APPLIOATION FILED MAR. 13, 1912. 1,095,596 Patented May 5, 1914.

3 SHEETSSHEET 1.

I] IIIIHWIIIIIIIIIH 4 A A A n umlu'nlu m 1111 I INVENTOR 87 a a 14%0RNEYS J. BIJUR. ENGINE ST ARTING APPARATUS. APPLICATION FILED .MAR.13, 1912.

Patented May 5, 1914.

3 SHEETS-SHEET 2.

INVENTOR V5. kn A TTORNEYS J. BIJUR. ENGINE STARTING APPARATUS. APPLICATION FILED MAR. 13, 1912.

Patented May 5, 1914.

3 SHEETS-SHEET 3.

Fig.8-

. 3 INVEHTOR bu. AvfJ-uA-A ATTORNEYS JOSEPH BIJ UR, OF NEW YORK, N. Y., ASSIG OF NEW YORK, N. Y., A 00 NOR TO BIJUR MOTOR LIGHTING COMPANY, RPORATIO'N OF NEW YORK.

ENGINE-STARTING APPARATUS.

To all whom it may concern:

I Be it known that I, JOSEPH BIJUR, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Engine- Starting Apparatus, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to starting apparatus, and with regard to the more specific features thereof, to means for starting internal combustion engines.

One of the objects of this invention is to provide practical ,and easily operated means for starting a-souirce of power.

Another objeQt-Qis to provide means of the above type of siinple and durable constructioir peculiarly adapted for use in connec tion with internal combustion engines.

Another object is to provide means of the above type which shall be convenient in control and whose action is automatic.

Other objects will be inpart obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein are shown one or' more of various possible embodiments of the several features of this invention, Figure 1 is a diagrammatic View of starting apparatus; Fig. 2 is a detail View of a magnetically controlled braking device; Fig. 3 is a sectional elevation of a resistance varying and circuit-completing device; Fig. 4 is a diagrammatic plan of another form of starting apparatus having various features in common with that shown in Fig. 1; Fig. 5 is a detail view of a magnetically controlled brake; Fig. 6 is a diagrammatic plan of another form of starting apparatus; Fig.

4 is a sectional elevation of a magnetically controlled resistance-varying and circuitcompleting device; and F 1g. 8 1s a detail view of a magnetic brake.

Specificationof Letters Patent.

Patented May 5, 1914.

Application filed March 13, 1912. Serial N 0. 683,426.

Similar reference characters refer to similar parts throughout the different views of the drawings.

Referring now to Fig. l of these drawings, there is shown an engine 1, preferably of the internal combustion type and comprising a crankshaft 2, on which is mounted a fly-wheel 3 or other driven member. The face of this wheel is preferably slightly crowned, as indicated at 4, for a purpose hereinafter described. Driven from shaft 2, as by gears 5, is a countershaft 6, which in turn drives through gears 7 an electric generator 8 provided with a shunt field 9. Leadin from this generator are the mains 10 and 11, in the former of which is placed a main switch 12 of the well-known type, comprising a voltage coil 13 and a series coil 14 so wound and connected as to attract. and close the contact member 15 upon the voltage reaching a value suitable for charging the storage-battery 16, connected as shown.

Mounted adjacent the member 3, in suitable bearings 17, is a shaft 18 having formed thereon right-hand and left-hand threads as shown. Upon these threaded portions are respectively fitted members19 and 20, preferably formed of case-hardened steel in the general conical form shown and so shaped as upon being forced toward one another by a suitable turning of the shaft, to grip therebetween and be wedged into contact with the outer surface of member '3. This wedging action substantially precludes slipping and is attained by the inclination or pitch of the coacting threads upon the inner surface of the members and the outer surface of the shaft. The latter member is driven by gear 21 and pinion 22 from a motor 23 and this gearing as well as the ratio of the effective diameters of the conical members to the effective diameter of member 3 are. so proportioned that one'revolution of the member 3 or crankshaft of the engine will correspond to about thirty of the armature shaft. Coacting with the members 19 and 20 is a swinging member 24 provided with a pair of arms 25 and 26 normally urged by a spring 27 against the outer surfaces of the cones, which are preferably flattened as indicated at 28. Swinging member 24 is secured to the pin 29, jourspring 27.

naled in the frame of the electro-magnet 30, and'the armature 31 of this magnet is also fast upon this. pin and hence controls the position of member 24, the attraction of the magnet acting in opposition to the force of The solenoid is connected across the mains 10 and 11 at a point on the generator side of the main switch 12 and is wound as a voltage coil. It will thus be seen that upon the engine being started the generator will immediately build up, thus enabling magnet 30 to attract its armature 31 and swing member 24 away from the threaded members 19 and 20.

Connected across the battery 16 is a voltage solenoid 32, the circuit of which is controlled by a swinging contact 33, conveniently positioned as upon the steering post of an automobile. -This member is locked in normal open-circuit position by a swinging segment 34, controlled by the spark lever in such manner that the latter must be swung to spark-retarding position before 30f the drawings.

' tacts 48, adapted after complete compresthe circuit can be completed at 33. It may also be noted that as the spark is advanced subsequent to the starting of the engine, this segment automatically throws lever 33' into open-circuit position, The circuit, comprising solenoid 32,

is preferably auto atically broken at another point as the conductors comprising thesame have serially connected therein a pair of coac't-ing contacts 36 and 37, the latter being mounted upon the swinging member 24 and insulated. therefrom, and the former being fixed in such position as to contact therewith when the member is swung upwardly by spring 27. It will thus be seen that as the generator is started the controlling circuit is automatically broken at this point by the attraction of the armature 31.

Motor 23 is provided with a series field winding 38 and a shunt field winding 39 and the circuit from the former leads to a fixed insulated plate 40, best shown in Fig.

upon thecasing of the solenoid 32, which is provided with a core or armature 41 so shaped as to form a magnet of the so-called iron-clad type. Threaded upon the upper end of this magnet is a cap 42, which coacts with a piston 43 secured to the core to form a dash-pot, the inlet of air being permitted bya passage 44 controlled by a ball valve 45. The lower end of core 41 is secured to a movable pressure-plate 46, between which and the plate 40 is a pressurecontrolled variable resistance medium 47 preferably comprising a set of carbon disks. These plates are insulated from their support but are provided with the pairs of con- This plate is mounted 'sion of the medium 47 -,to form a shunt about the same and eliminate its ultimate resistance. Secured to the plate 40 and insulated therefrom is a contact 49, adapted to coactwith a contact 50 mounted upon and connected with the plate 46, and these contacts are positioned closely adjacent one another so that even a slight movement of core 41 from its completely depressed position will close the circuit at this point, further movement of the core being permitted by the spring formation ofthe arm 51 on which the contact 49 is mounted. From contact 49 a conductor-.52 leads to one side of the bat tery and a conductor 53 leads from the other side of the battery to the terminal of the motor atv which the shunt coil 39 is connected, the remaining connection of this coil being with the plate 46.

The operation of the above-described embodiment of this invention is substantially as follows :-Assuming that it be desired to start theengine 1 as of an automobile, the spark-lever is first swung into the full line position, thus retarding the spark, and lever 33 is then thrown into the circuit-completing osition shown. The current is thus led om the storage-battery through the voltage solenoid 32, the contacts 36 and 37 being in engagement, due to the denergization of the solenoid 30. Solenoid 32 will immediately attract core 41, and at the start of its movement will bring contacts 49 and 50 into engagement, thus leading current through the motor from the battery in series with the resistance medium 47, which is substantially at its full value; The core 41 in continuing its movement gradually compresses this resistance and .finally shunts it altogether, this action being cushioned by the dash-pot arrangement above described. The motor will be started as soon as contacts' 49 and 50 are brought into engagement and will drive the shaft 18 in such direction as to force the members 19 and 20 toward one another, the latter being frictionally held against'rotation by the pressure of the arms 25 and 26. Just as the flattened portions 28 pass from these arms the conical described the fly-wheel 3 is immediately rotated and the engine started, and by its action in driving the members 19 and 20, they travel in a reverse direction on their threads and move out of operative position toward gcuit of solenoid 32, unless the latter has already been broken by the advancing of the spark-lever as above described. As solenoid 32 is deenergized the weight of the parts immediately cuts inresistance 47 and then breaks the circuit of the motor at contacts} parts still tend to spin 49 and 50. If the by their inertia, the again thrown toward the wheel 3, arms 25 and 26 being withdrawn, they turn freely with shaft 18. In this'manner any hunting action or tendency of the conical members to move back and forth into and out of operative position after the engine isstarted is entirely avoided.

' In Fig. 4 of the drawings is shown a different embodiment of certain features of this invention and in this apparatus the engine 1 drives a member 54, which may serve as the fly-wheel and is provided with gear teeth 55. Mounted adjacent this member, in the bearings 56, is a shaft 57, having a portion 58 upon which is threaded a pinion 59. Secured to this pinion 59 are a collar 60 and a leather disk 61, these parts being adapted to travel as a unit upon the member 57.

cones 19 and 20v are not There is also threaded upon the latter member a nut 62 tied to the collar 60 by a fiatspring 63 in such manner that this nut will travel with the collar, and the spring 03 tending to force these parts toward or away from one another will take up any back lash or looseness in the threads and prevent an undesirable spinning action. The shaft 58 is driven by gears 21 and 22 from a motor as in the apparatus heretofore described. The connectionsand controlling mechanism I of this motor are also substantially identical with the corresponding parts of the first described apparatus, but the circuit of solenoid 32 is closed in the first'instance by a push-button (54 conveniently positioned, as on the steering-post of an automobile. This circuit, furthermore, leads through the spark-lever 65 and a coacting contact plate 66 in such manner that it is necessary that the spark be retarded by movement of the lever into full line position before the solenoid 32 can be energized. Resiliently urged against the outer surface of collar 60, by spring 67, is one arm of a bell-crank lever 68, the remaining arm of which forms an armature for a solenoid 69 connected across the mains 10 and 11 on the generator side of the main switch 12. This arm 68 exerts a braking action upon the threaded member until the pressure is relieved and the solenoid cir-' cuit broken by the energization of magnet 69. .There is preferably secured to the outer 'ally starting the as, the

face of the member 54 a ring 70, flanged as at 71, to project into the path of the leather disk 61.

The action of the above apparatus is closely similar to that first described, but the following features of its operation should be noted :If it be desired to start the en gine 1, the spark is retarded and the circuit of solenoid 32 completed at 64, thus gradumotor 23. This action throws the member 59 inwardly, as its rotation is retarded by the lever 68, and as the teeth come into mesh with the teeth 55, collar passes out from underarm 68. Pinion 59 travels fully into mesh with the gear 55, being held by the latter against rotation until it has completed its'travel and rests against a fixed collar 59 on the shaft 57. At this stage the resistance in series with motor 23 is shunted and the motor exerts its full power to turn over the engine 1 and start the same. As the engine is started it drives generator 8 to energize magnet 69 and the freely turning member 59 travels upon shaft 57 out of engagement with member 54, the motor being shut off, due to the breaking-of the solenoid circuit at contacts 36 and 37. If the shaft 57 is still spinning as the member 59 withdraws into the inoperative position shown, it will not throw the latter again into mesh as it will spin with the shaft, due to the continued retraction of lever arm 68 and the nice fitting of the threads brought about by the action of spring 63. The return of pinion 59 into mesh is further prevented by the action of the flange 71 engaging the disk 61, which engagement, with the engine running, would be of itself sufficient to cause member 59 to be so rotated as to again vrece de from member 54. It is to be understood, however, that this engagement between the disk'61 and flange 71 is not sufficiently positive to prevent the parts passing into'operativerelation when the engine is started, as disk 61 will yield in passing the then stationary flange.

apparatus which also embodies certain features of this invention. In this case the engine and its fly-wheel, together with the parts immediately coacting with the latter, are substantially identical with the corresponding parts of the apparatus depicted in Fig. 1. The motor 23 is here connected through a conductor 72 and a contact member 33 to one side of the battery 16, which may be charged from a generator driven from the engine if desired. The remaining motor lead passes through a series field 73 and resistance medium 74 to the opposite battery terminal. Also connected across the battery is a circuit comprising a solenold 7 5 and a magnet 7 6 in series one with another, this circuit being formed in part by the conductor 7 2 and hence being dependent for its completion upon the contact member 33. Solenoid 75 controls resistance 74, and by means of the device shown in Fig. 7 of the drawings, which, in its mechanical elements, is siiibstantially identical with that shown in Fig. 3 already, the corresponding parts are accordingly correspondingly lettered and is closed by contact member 33 as already described. This action completes a circuit through the motor 23, the shunt field 39 being fully energized and the series field 7 3 being connected through the resistance 74. The closing of the circuit, moreover, energizes solenoid 75, which gradually compresses and ultimately shunts resistance 74, and the magnet 76 is alsoenergized with the closing of the circuit to bring about a braking action on the cones until they have passed into engagement with the member 3,

as already described. Whenthe engine is started, it, as previously set forth, tends to throw the cones out of operative relation, and as the spark is advanced by lever 35, the circuits of motor 23 and of solenoids 75 and 7 6 are broken, thus permitting the cones to reach their outward limit of travel and prevent any tendency to again drive them into engagement with member 3.

It will thus be seen that there is herein described apparatus in which the several features of this invention are embodied, and which apparatus in its action attains the various objects of the invention and is well suited to meet the requirements of practical use.

i s many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having desc'ribedmy invention, what I claim as new and desire to secure by Letters Patent is:

1. In apparatus of the class'described, in combination, an engine, a member driven by said engine, a source of power, and means comprising a member driven from said source of power adapted to move said second member upon being so relation to said first member and drive the same and upon being driven from said endriven into operativegine automatically to move out of operative relation to said first member.

f 2. In apparatus of the class described, in combination, an internal combustion engine, a member driven by said engine, a source of power, a rotatable member, and means driven from said source of power adapted to 'move said rotatable member into operative relation to said first member and drive said first member through said rotatable member to start said engine.

3. In apparatus of the class described, in combination, an engine, a member driven by said engine, a source of power, a member driven thereby and adapted to be driven by said first member, and means adapted upon said second member being so driven to'move it out of operative relation to said first member to disengage thereby said engine and said source of power.

4. In apparatus of the class described, in combination, an internal combustion engine, a member driven by said engine, a source of power, a rotatable member driven from said source of power, and means mounting said rotatable member adapted upon the same being driven from said source of power to move it into operative relation to said first member and drive said engine and adapted upon said engine being started to move said rotatable member out of operative relation to said first member.

5. In apparatus of the class described, in combination, an engine, a member driven by said engine, a source of power, a rotatable member, a supporting member driven from said source of power and having said rotatable member threaded thereon, said threaded member being positioned to move said rotatable member into operative relation to said first member and start said engine and. means adapted to cause said rotatable member to advance along said supporting member upon the latter being driven from said source of power.

'6. In apparatus of the class described, in combination, an engine, a member driven by said engine, a source of power, a rotatable member, a supporting member driven from said source of power and having said rotatable member threaded thereon, said threaded member being positioned to move said rotatable member into operative relation to said first member and start said engine and means adapted to cause said rotatable member to advance along said supporting member upon the latter being driven from said source of power, said rotatable member being formed to trictionally engage and drive said first member.

7. In apparatus of the class described, 111- threaded f I l,095,696

.thread and .a left hand thread, a pair of members respectively'mounted upon said threaded portions and positioned to grip and drive said first member upon said threaded member being turned, 7 means adapted to drive :said threaded member from said source of power, and means adapted 'to retard the rotary movement of said pair of membersas said threadedmeinber isdriven. I I,

'9. In apparatus of the class described, in combination, an engine, a member driven by said engine, a source of power, a rotatable member provided with a right hand thread and a left hand thread, a pair of members respectively 'mounted upon said threaded portions and positioned to grip and vdrive said first member upon said threaded memberbeing turned, and means adapted to drive said threaded member from said source of power, the members of said pair being provided with inclined surfaces to engage said firstme-mber.

10. In apparatus of the class described, in combination, an engine, a member driven by said engine, a source of power, a rotatable member, and a supporting member driven from said source of power and having said rotatable member threaded thereon, saidthreaded member being positioned to move said rotatable member into operative of power,

relation to said first member and start said engine upon being driven from said source said rotatable member being formed to frictionally engage and drive said firsttmember, said member being formed to provide an inclined surface. for engagement with said first member. v i

11. I In apparatus of the class described, in combination, anengine, a member driven by said engine, a source of power, a rotatable member, a supporting member driven from said source of power and havmember,

mg said rotatable member threaded thereon, said threaded member .being positioned to move said rotatable member into operative relationto said engine upon .bemgdriven from said source first member and start said of power, and means tending to retard the rotary movement of said member upon said threaded member. 1

12. In apparatus of the class, described, in

combination, an engine, a member driven by a rotatable said engine, a source otpower,

a supporting member driven from gine upon being 7 ed member being said engine,

said source of powerand having said rotatable member threaded thereon, said threaded member being positioned to move said rotatable member into operative relation to said first member and start said endriven from saidsource of power, means tending to retard the rotary movement of said member upon said threaded member, and means adapted automatically to render inoperative said retarding means.

18. In apparatus of the class described, in combination, an engine, a member driven by said engine, .a source of power, a rotatable member, a supporting member driven from said source of power and having said rotatable member threaded thereon, sa-id threadpositioned to move'said rotatable member into operative relation to said first member and start said engine upon being driven from said source of power, means tending to retard the rotary movement of said member upon said threaded member, and means adapted automatically to render'inoperative said retarding means upon said engine beingstarted.

14. In apparatus of the class described, in combination, .an engine, a member driven by said engine, a source ofpower, a rotatable member provided with a right hand thread and a left hand thread, a pair of members respectively mounted upon said threaded portions and positioned to grip and drive said first member upon said threaded member being turned, means adapted to drive said threaded member from said source of power, means adapted to retard the rotary movement of said pair of members as said threaded adapted automatically to release said retarding means on said engine being started.

15. In apparatus of the class described, in combination, an engine, a member driven from said engine, a member adapted to en gage and drive said first member to start said engine, and means adapted to drive said second member and wedge it into operative relation to said first member.

7 16. In apparatus of the class described, in combination, an engine, a. member driven from said engine, a member adapted to engage and drive said first member to start and means adapted to drive said second member and Wedge it into frictional engagement with said first member.

17. In apparatus of the class described, in combination, an engine, a, member driven from said engine, a member adapted to engage and drive said first member to start said engine, andmeans so mountinghsaid second member as to wedge it into operative position by the-reaction of its driving force on said first member.

18. In apparatus of the class combination, an engine, a member driven member is driven, and means.

described, in

from said engine, a source of power, a member adapted to engage and drive said first member to start said engine, a shaft driven from said source of power and having said second member threaded thereon and so positioned as upon being driven relatively to said second member to move said second member into engagement with said first member and wedge it against the same by the reaction of its driving force thereon and means tending to retard the rotation of said second member with respect to said first member.

19. In apparatus of the class described,in combination, an engine, a member driven from said engine, a pair of members, means adapted to cause the members of said pair ,to approach one another and grip therebeends toward one another.

21. In apparatus of the class described, in combination, an engine, a member driven from said engine, a pair of members, a shaft having a right hand thread and a left hand thread, the members of said pair being respectively mounted upon said threads and positioned to embrace a portion of said first member, and means adapted to drive said shaft and force the members of said pair to grip said first member.

22. In apparatus of the class described,

in combination, an engine, a member driven from said engine, a threaded shaft, a comcal member threaded thereon and positioned to be moved into engagement with said first member and drive the same as said shaft is turned, and means adapted to drive said shaft.

. in combination, an

23. In. apparatus of the class described, engine, a member driven by said engine, a source of power, and means comprising source of power adapted to move said member upon being so driven and wedge the same into operative relation to said first member to drive said engine and upon being driven .from said engine automatically to move out of operative relation .to said first member,

24:. In apparatus of-the class described,

in combinatiom-an engine, a member driven.

by said engine, a source of power, a rotatable member, and means dr ven from said source of power adapted tomove said roa member driven from saidtatable member and wedge the same into operative relation thereto and drive said first member through said rotatable member to start said engine.

25. In apparatus of the class described, in combination, an engine, a member driven by said engine,.a source of power, and means comprising a pair o-fmembers driven from said source of power adapted to move the members of said palr toward one another upon being so driven to grip said first member and drive the same and upon being driven from said engine to move away from one another out of operative relation to said first member.

26. In apparatus of the class described,'in combination, an engine, a member driven from said engine, a member adapted to en gage and drive said first member to start said engine, and means adapted to wedge said second member into operative position by the reaction of itsfdriving force on said first member and to move it out of operative relation to said first member upon being driven thereby after the engine is started.

27. In apparatus of the class described, in combination, an internal combustion engine, a member driven by said engine, a member mounted for rotation and reciprocation, means for moving at will said second member'rectilinearly into driving engagement with said first member and for rotating said second member to rotate thereby said first meniber and said engine, and for effecting the disengagement of I said members auto matically when said engine has started.

28. In apparatus of the class described, in combination, an internal combustion engine, a member driven bysaid engine, a rotatable member, means for moving at will said sec- 0nd member axially into driving engagement wlth said first, member andfor rotatmg said second member to rotate thereby said first member and said engine, and for effecting the return axial movement of said second member out of engagement with said first member automatically when said engine has started. 29. In combination, an internal combustion engine, a source of power, and normally disengaged power transmitting means interposed between said engine and said source of power and permitting said engine normally to turn in either direction independent of said source of power, said parts being formed and mounted to be moved automatically into an operative connection betweensaid engine and said source of power by the starting of said source of power. 30. In combination, an internaI combustion engine, a source of power, and normally disengaged power transmittlng means mterposed between said engine and said source of power andpermitting said engine normally to turn in either direction independent of said source of power, said parts being formed and mounted to be moved automatically into an operative connection between said engine and said source of power by the starting of said source of power, and to be automatically returned to normal condition by the starting of said engine.

31. In combination, an internal combustion engine, a source of power,- a pair of normally disengaged gears interposed between said engine and said source Off power, and means actuated by the starting of said source of power adapted automatically to bring said gears into engagement and complete a power transmitting connection between said engine and said source of power and to disengage said gears automatically to break said power transmitting connection as said engine is started.

32. In combination, an internal combustion engine, a source of power, a pair of normally disengaged gears interposed between said engine and said source of power, one of said gears being axially movable into and out of engagement with a second gear, and means actuated by the starting of said source of power adapted automatically to shiftsaid first gear axially into engagement with said second gear and complete a power transmitting connection between said engine and said source of power and to disengage said gears automatically as said engine is started.

33. Inicombination, an engine, a threaded driving shaft, a driving member threaded on said shaft and normally out of contact with said engine, and means cooperating with said shaft adapted automatically to move said member into contact with said engine as saidshaft is started and automatigine is started.

34. A starter for gas engines and the like, comprising in combination with a member operatively connected with the engine, a motor, a driving member operated thereby and adapted to cooperate with and drive the other member but normally out of engagement therewith, and means adapted upon said motor being started automatically to move said driving member into engagement with said first member.

'35. A starter for gas engines and the like, comprising, in combination with a member operatively connected with the engine, a riving member adapted to coiiperate with and drive the other member but normally out of engagement therewith means tending to retard the rotation of said driving member, a rotatable shaft with which said driving member coacts to produce longitudinal movement relative to the shaft for automati cally moving the driving member into driving engagement with the other member whenever the shaft is rotated, and a motor for operating the shaft.

cally to withdraw said member as said en 36. A starter for gas enginesand the-like comprising in combination'with a member operatively connectedwith the engine, a motor,- a shaft driven thereby, a driving member adapted to engage and drive the engine member but normally out'of engagement therewith and means tending to prevent rotation of said driving member, said driving member being mounted on the shaft' and having screw threaded engagement therewith whereby rotation of the shatt ad- -vances such driving member into engagement with the engine member.

87. A starter for gas engines and the like, comprising in combination with a member operatively connected with the engine, an electric motor including its armature shaft, a screw threaded shaft in line with the ar'- mature shaft and driven thereby, a driving member adapted to engage and drive the engine member but normally out of engagement therewith a'ndmeans tending to impede rotation of saiddriving member, said driving member being mounted on the screw threaded shaft and having means for engaging the latter whereby operation of the motor advances the driving member into engagement with the engine member.

38. A starter for gas engines and the like comprising, in combination with a gear wheel operatively connected with the engine, a motor, a shaft driven by the motor and" having screw threads for a port-ion of its length and a stop shoulder at one end otsaid threads, a pinion mounted on the shaft and having a bore engaging said threads, for longitudinal movement relative to the shaft when rotated and means tending to impede rotation of said pinion, the rotation of the shaftadvancing the pinion'into mesh with the wheel andthe subsequent rotation of the wheel when exceeding that of the shaft withdrawing the pinion from mesh.

39. In apparatus or" the class described, in combination, an internal combustion engine, a gear operatively connected with said 1 engine, a second gear adapted to mesh with said first gear and normally disposed offsetin an axial direction from its meshing position, a motor, and means adapted automatically upon said motor being started to move said second gear in an axial direction into mesh with said first gear and drive said first gear.

40. In apparatus of the class described,

in combination, an engine, a source of power,

gearing between said engine and said source of power, means actuated by said source of power for engaging said'gearingsimultaneously with the starting of said source of power, and automatic means for throwing said gearing out of engagement when the engine has started. 5

41. A starter for gas engines and the like,

comprising in combination with a member operatively connected with the engine, motor, a driving member operated thereby and adapted to cooperate with and drive the other member normally out of engagement therewith, and means comprising a threaded connection between a motor-driven shaft and the driving member adapted,- upon said motor being started, to move said driving member automaticallyinto engagement with said first member.

42. A starter for gas engines and the like, comprising in combination, a member operatively connected with the engine, a motor,

a shaft driven thereby, a driving member- .rotated by said shaft and adapted to cooperate with and drive the first member, but

normally out of engagement therewith, a threaded-connection between said shaft and said driving member, and means for retarding the initial rotation of said driving memher when said shaft is set in rotation whereby upon said motor being started said driving member 18 moved automatically into engagement with said first member.

43. In apparatus of the class described,

in combination,-.an internal combustion engine, a gear operatively connected with said engine, a second gear .adapted'to mesh with said first gear and normally disposed offset in an axial direction from its meshing posi tion, and means comprising a threaded connection between said second gear and its driving shaft, and a device to retard the initial rotation of said gear whereby upon said motor being started said second gear is moved automatically in an axial direction into mesh with said first gearand drives said first gear.

In testimony whereof I afiix my signature, 40

in the presence of two witnesses.

JOSEPH BIJUR.

\Vitnesses:

L. A. WATSON,

iOBERTL. BLAIR. 

